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For questions specific to Windows 8.1. Use [windows] instead for questions involving Windows in general.

Windows 8.1 Update and Windows RT 8.1 Update include improvements to make Windows more familiar and convenient for devices that use touch and mouse input and to make Windows available on a wider variety of devices, so you have more to choose from.

Windows 8.1 Update and Windows RT 8.1 Update also include security and performance updates, and they must be installed for your PC to receive any future security updates for Windows 8.1 or Windows RT 8.1.

What’s new in Windows 8.1 Update and Windows RT 8.1 Update?

Version Relation:

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